<template>
  <div>
    <el-upload
      v-if="type == 'url'"
      :action="uploadUrl"
      :before-upload="handleBeforeUpload"
      :on-success="handleUploadSuccess"
      :on-error="handleUploadError"
      name="file"
      :show-file-list="false"
      :headers="headers"
      class="editor-img-uploader"
    >
      <i ref="uploadRef" class="editor-img-uploader"></i>
    </el-upload>
  </div>
  <div class="editor">
    <quill-editor
      ref="quillEditorRef"
      v-model:content="content"
      content-type="html"
      :options="options"
      :style="styles"
      @text-change="e => $emit('update:modelValue', content)"
    />
  </div>
</template>

<script setup>
import axios from 'axios'
import { QuillEditor } from '@vueup/vue-quill'
import '@vueup/vue-quill/dist/vue-quill.snow.css'
import { getToken } from '@/utils/auth'

const { proxy } = getCurrentInstance()

const quillEditorRef = ref()
const uploadUrl = ref(import.meta.env.VITE_APP_BASE_API + '/file/upload') // 上传的图片服务器地址
const headers = ref({
  Authorization: 'Bearer ' + getToken()
})

const props = defineProps({
  /* 编辑器的内容 */
  modelValue: {
    type: String
  },
  /* 高度 */
  height: {
    type: Number,
    default: null
  },
  /* 最小高度 */
  minHeight: {
    type: Number,
    default: null
  },
  /* 只读 */
  readOnly: {
    type: Boolean,
    default: false
  },
  /* 上传文件大小限制(MB) */
  fileSize: {
    type: Number,
    default: 5
  },
  /* 类型（base64格式、url格式） */
  type: {
    type: String,
    default: 'url'
  }
})
const emit = defineEmits(['update:modelValue'])

const options = ref({
  theme: 'snow',
  bounds: document.body,
  debug: 'warn',
  modules: {
    // 工具栏配置
    toolbar: [
      ['bold', 'italic', 'underline', 'strike'], // 加粗 斜体 下划线 删除线
      ['blockquote', 'code-block'], // 引用  代码块
      [{ list: 'ordered' }, { list: 'bullet' }], // 有序、无序列表
      [{ indent: '-1' }, { indent: '+1' }], // 缩进
      [{ size: ['small', false, 'large', 'huge'] }], // 字体大小
      [{ header: [1, 2, 3, 4, 5, 6, false] }], // 标题
      [{ color: [] }, { background: [] }], // 字体颜色、字体背景颜色
      [{ align: [] }], // 对齐方式
      ['clean'], // 清除文本格式
      ['link', 'image', 'video'] // 链接、图片、视频
    ]
  },
  placeholder: '请输入内容',
  readOnly: props.readOnly
})

const styles = computed(() => {
  const style = {}
  if (props.minHeight) {
    style.minHeight = `${props.minHeight}px`
  }
  if (props.height) {
    style.height = `${props.height}px`
  }
  return style
})

const content = ref('')
watch(
  () => props.modelValue,
  v => {
    if (v !== content.value) {
      content.value = v == undefined ? '<p></p>' : v
    }
  },
  { immediate: true }
)

// 如果设置了上传地址则自定义图片上传事件
onMounted(() => {
  if (props.type == 'url') {
    const quill = quillEditorRef.value.getQuill()
    const toolbar = quill.getModule('toolbar')
    toolbar.addHandler('image', value => {
      if (value) {
        proxy.$refs.uploadRef.click()
      } else {
        quill.format('image', false)
      }
    })
    quill.root.addEventListener('paste', handlePasteCapture, true)
  }
})

// 上传前校检格式和大小
function handleBeforeUpload(file) {
  const type = ['image/jpeg', 'image/jpg', 'image/png', 'image/svg']
  const isJPG = type.includes(file.type)
  //检验文件格式
  if (!isJPG) {
    proxy.$modal.notifyWarning(`图片格式错误!`)
    return false
  }
  // 校检文件大小
  if (props.fileSize) {
    const isLt = file.size / 1024 / 1024 < props.fileSize
    if (!isLt) {
      proxy.$modal.notifyWarning(`上传文件大小不能超过 ${props.fileSize} MB!`)
      return false
    }
  }
  return true
}

// 上传成功处理
function handleUploadSuccess(res, file) {
  // 如果上传成功
  if (res.code == 200) {
    // 获取富文本实例
    const quill = toRaw(quillEditorRef.value).getQuill()
    // 获取光标位置
    const length = quill.selection.savedRange.index
    // 插入图片，res.url为服务器返回的图片链接地址
    quill.insertEmbed(length, 'image', res.data.url)
    // 调整光标到最后
    quill.setSelection(length + 1)
  } else {
    proxy.$modal.notifyWarning('图片插入失败')
  }
}

// 上传失败处理
function handleUploadError() {
  proxy.$modal.notifyWarning('图片插入失败')
}

// 复制粘贴图片处理
function handlePasteCapture(e) {
  const clipboard = e.clipboardData || window.clipboardData
  if (clipboard && clipboard.items) {
    for (let i = 0; i < clipboard.items.length; i++) {
      const item = clipboard.items[i]
      if (item.type.indexOf('image') !== -1) {
        e.preventDefault()
        const file = item.getAsFile()
        insertImage(file)
      }
    }
  }
}

function insertImage(file) {
  const formData = new FormData()
  formData.append('file', file)
  axios
    .post(uploadUrl.value, formData, {
      headers: { 'Content-Type': 'multipart/form-data', Authorization: headers.value.Authorization }
    })
    .then(res => {
      handleUploadSuccess(res.data)
    })
}
</script>

<style>
.editor-img-uploader {
  display: none;
}
.editor,
.ql-toolbar {
  white-space: pre-wrap !important;
  line-height: normal !important;
}
.quill-img {
  display: none;
}
.ql-snow .ql-tooltip[data-mode='link']::before {
  content: '请输入链接地址:';
}
.ql-snow .ql-tooltip.ql-editing a.ql-action::after {
  border-right: 0px;
  content: '保存';
  padding-right: 0px;
}
.ql-snow .ql-tooltip[data-mode='video']::before {
  content: '请输入视频地址:';
}
.ql-snow .ql-picker.ql-size .ql-picker-label::before,
.ql-snow .ql-picker.ql-size .ql-picker-item::before {
  content: '14px';
}
.ql-snow .ql-picker.ql-size .ql-picker-label[data-value='small']::before,
.ql-snow .ql-picker.ql-size .ql-picker-item[data-value='small']::before {
  content: '10px';
}
.ql-snow .ql-picker.ql-size .ql-picker-label[data-value='large']::before,
.ql-snow .ql-picker.ql-size .ql-picker-item[data-value='large']::before {
  content: '18px';
}
.ql-snow .ql-picker.ql-size .ql-picker-label[data-value='huge']::before,
.ql-snow .ql-picker.ql-size .ql-picker-item[data-value='huge']::before {
  content: '32px';
}
.ql-snow .ql-picker.ql-header .ql-picker-label::before,
.ql-snow .ql-picker.ql-header .ql-picker-item::before {
  content: '文本';
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value='1']::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value='1']::before {
  content: '标题1';
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value='2']::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value='2']::before {
  content: '标题2';
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value='3']::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value='3']::before {
  content: '标题3';
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value='4']::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value='4']::before {
  content: '标题4';
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value='5']::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value='5']::before {
  content: '标题5';
}
.ql-snow .ql-picker.ql-header .ql-picker-label[data-value='6']::before,
.ql-snow .ql-picker.ql-header .ql-picker-item[data-value='6']::before {
  content: '标题6';
}
.ql-snow .ql-picker.ql-font .ql-picker-label::before,
.ql-snow .ql-picker.ql-font .ql-picker-item::before {
  content: '标准字体';
}
.ql-snow .ql-picker.ql-font .ql-picker-label[data-value='serif']::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value='serif']::before {
  content: '衬线字体';
}
.ql-snow .ql-picker.ql-font .ql-picker-label[data-value='monospace']::before,
.ql-snow .ql-picker.ql-font .ql-picker-item[data-value='monospace']::before {
  content: '等宽字体';
}
</style>
